Grip-tread for vehicle-tires.



H. "D. WEED.

GRIP TREAD FOR VEHICLE TIRES.

APPLICATION FILED MAR.I31'1906.

Patented June 1, 1915.

3 SHEETSSHEET I.

I H. D. WEED.

GRIP TREAD F'OR VEHICLE TIRES. APPLICMION FILED MAR. 13, 1905. I 1,141,735. Patented June 1, 1915.

3 SHEETS-SHEET 2.

H. D. WEED.

GRIP TREAD FOR VEHICLE TIRES.

APPLICATION FILED MAR. 13. 1906. 3 1,141,735. Patented June 1, 1915.

3 SHEETS-SHEET 3- r as amen onnroa,

HARRY D. WEED, 0F CAN'ASTOTA, NEW YORK, ASSIGNOB- TO WALTER B. LASHAR, 0F

BRIDGEPO RT, CONNECTICUT.

'GRIP-TREAD FOR VEHICLE-TIRES.

'State of New York, have invented new and useful Improvements in Grip-Treads for Vehicle-Tires, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description. This invention relates to certain improvements in grip treads for vehicle tires of the class set forth in my pending application No. 3%,510.

The essential purpose of my present invention is to loosely apply a circumferential series of wearing plates or elements to the periphery or tread of'the tire in such manner that they will have a free and independ ent circumferential and rocking movement around and upon the tire.

Another object is to bring the points of attachment of'the attaching elements within the tread or wearing faces of the plate. 4 Other objects and uses will appear in the following description.

In the drawings, Figure l is a side elevation of a portion, of a pneumatic vehicle tire and a series of one form of tread plates and their attaching elements whereby they are held upon the periphery of the tire. Figs. and 3 are respectively a transverse sectional view and a top plan view of the parts seen in Fig. 1. Figs. 4, 5 and 6 are respectively top plan, side elevation,'and transverse sectional views of a portion of a'vehicle tire and a still further modified form of the gripping elements and attaching 'means therefor. Fig. 7 is a perspective view of one Fig.8 is a plan of av further modified form of grip tread. Fig. 9 is a perspective view of one of the gripping elements seen in Fig. 10.

Fig. 10 is a sectional view of a wearing plate similar to that Seen in Figs. 1, 2 and 3 showing attaching elements detachably connected thereto.

The grip tread or armor hereinbefore referred to comprises the entire circular series 'of wearing plates and their attaching eletire. But in order to avoid unnecessary drawing and.also for the purpose of more clearly defining the invention I-have shown only portions of a tire and'correspondin'g portions of the grip tread..

' Specification of Letters Patent.

Patented June a, rare.

Application filed March 13, 1906. Serial No. 305,754.

In Figs. 1, 2 and 3, this grip tread preferably consists of a circular series of separate wearing elements 1''- arranged side by side circumferentially around the tire and having substantially flat inner faces resting upon the tread of the tire and tangentially -to the transverse curvature of said tread, as best seen 1n Flg. 2. g

The sldes or transverse ends of each wearing element 1 preferably extend some suitable bearings 2 which are. depressed some distance within the planeof the wearing surface for receiving suitable attaching elements, as in this instance flat links 3'-, which are connected to opposite circular side pieces '4', one at each side of the tire for holding the wearing elements centrally upon the periphery of the tire, as A.

The attachingelements 3 are wholly within the plane of outer faces or wearing surfaces of the tread elements -1- and are flexibly connected to the bearings 2- and side pieces '4."-"to enable the tread elements +1-to conform to the depression of the tread of the tire caused by the superimposed load or obstructions which the wheel may encounter while traveling along the pavement. 4

By making the inner faces of the wearing elements 1' flatand tangential to theof my improved grip tread are, first, that,

the attaching points of the attaching elements are removed some distance within the wearing surfaces of the tread elements; second, that the contacting surfaces between said elements and periphery of the tire is reduced to a minimum third, that these elements have a free transverse rocking or flex ngaction on the'periphery of the tire; i

and fourth, that the entire grip tread has to confine it at any particular point or points in the tire.

Each of the Wearing shown as provided with a central opening -2'- and with opposite side slots --3' through which the links 3 are inserted and attached to the bearings -2--.

All of the elements of the grip tread are made of suitable metal adapted to withstand the strain and wear to which they are subjected, the wearing elements 1 being preferably made of cast metal, such as malleable iron or equivalent tenacious metal and are adapted to be replaced when 'impaired by wear or other cause, without sacrificing the attaching elements or side pieces.

. In Figs. 4, 5 and 6 I have shown a series of tread elements, as rin s --15, arranged and upon the pelines in Fig. 6, and connected by attaching elements 16 to hooks 17- on the rim, Y as -l8--, of the wheel. In this instance the wearing elements -15' and their attachingelements 16 form one continuous flexible chain pr cable which is laced or drawn across the periphery of the tire and detachably looped or enga ed at intervals with the hooks.17 .whic are secured in staggered relation to the rim -18.

As in Figs. 1 to 3 inclusive the attaching elements -16 are flem'bly connected to. depressed bearings -19- on the sidesof the wearing elements-15-- within the plane of the wearing surface to avoid contact of the attaching elements with the pavement, thereby preserving their integrity and bringing the wear entirely upon the tread plates or rin s -15-- which are made of suitable meta to withstand the strain and wear to which they are subjected and when impaired may be replaced by new ones without sacrificing the attaching elements, as -16--.. In equipping the tire with this last described grip tread one'end of the continuous chain or cable constituting the wearing links and attaching elements is hooked ifito one of the hooks --17- and the chain or cable is then drawn diagonally back and forth across the tread of the tire and attached at intervals to the remaining staggered hooks 17-until the other end is returned to and hooked upon the first named hook or that next adjacent to it. y

In Fig. 8-I have shown a circular series of gripping elements, as rings 20, arranged one in advance of the other around and upon the periphery of the tire, as -C,

and each connected by a series of, in this elements 1- is As in the previously described gripping elements the rings 20-- are provided with depressed bearings 23-- to which the attaching members 2l are flexibly connected so as to lie within the wearing sur- 7'.

. faces of the members 20 and thereby 1 elements and attaching elements might be disclosed, having the common advantage of connecting the attaching elements to the wearing elements within the wearing surfaces of the latter so as to, bring the wear entirely upon the Wearing elements and not upon the attaching devices.

In Fig. 10 I have shown a wearing plate 1 as provided with depressed bearings 2 for receiving detachable attaching devices, such as snap hooks -30-, which may be readily disconnected from the wearing plate --1-- to permit the latter to be reoved when worn or otherwise impaired. Reference is hereby made to my pending application #241,646 filed Jan. 18,-1905; #287,868, filed No m,- 1905; #312,041 filed April 16, 1906; #402,778, filed Nov. 19, 1907 and #423,323, filed March 26, 1908.

What I claim is,

1. A grip-tread for the tires of wheels. vcomprisin longitudinal retaining members, sections '0 cross-chains having their ends connected with said retaining members, and tread-rings, said rings having alternately disposed large and reduced portions, said reduced portions providing annular receiving spaces in which the end-links of said cross-chains are arranged and connected with said reduced portions.

2. A grip tread for the tires of wheels comprisin tread rings having alternately disposed rge and reduced portions, and attaching members connected to said reduced portions.

3. A grip tread for resilient wheel-tires comprising tread members presentingclosed open-centered outlines to the tire and having alternately disposed projecting wearing portions and depressed attaching portions and attaching members connected to said depressed attaching portions.

4:. A tread grip for resilient wheel tires comprising tread members presenting closed open-centered outlines to the tire and having projecting wearing portions to engage the roadway and depressed attaching portions and attaching members connected to said depressed attaching portions. I

5. A chain mat for resilient tires comprising side chains, tread pieces presentin closed open-centered outlines to the tire, an securing chains for each tread piece secured "to either side chain at remote points and to each tread piece at fixed lOCtLiZlOIlS.

6. p A chain mat for resilient tires comprising sidechains, rin'gshaped tread pieces having opposite portions thereof reduced to r 7. A chain mat for resilient tires comprising side chains, tread pieces presenting closed open centered outlines to the tire, and

' securing chains formed of flat links for each tread piece secured to either side chain at .remote points and to each tread piece at fixed locations.

8. A chain grip for resilient tires com? prising side chains, ring shaped tread pieces each having opposite portions thereof reduced to provide two pairs of anchor seats,

the members of each pair of seats being arranged in spaced relation, and securing chains for each tread piece having one of their ends fixed to said seats to prevent movement on the tread piece and having their other ends connected to the side chains at remote locations.

9. A chaingrip for resilient tires comprising side chains, ring shaped tread pieces having opposite portions thereof reduced to provide two pairs of anchor seats, the members of each pair of seats being arranged in spaced relation, and securing chains having one of their ends fixed to said seats to prevent movement on the tread pieces and having their other ends connected to the side chains.

In Witness whereof I have hereunto set my hand on this 10th day of March 1906. HARRY D. WEED. Witnesses:

H1 E. CHASE, HOWARD P. DENISON. 

